Rotary lath punch drive



July 24, 1951 v E. SKILLMAN 2 ROTARY LATH PUNCH DRIVE Filed Feb. 28,1950 4 Sheets-Sheet l I -1. IN V EN TOR.

Zak/App 637W July 24, 1951 Filed Feb. 28, 1950 E. SKILLMAN ROTARY LATHPUNCH DRIVE 4 Sheets-Sheet 2 July 24, 1951 v E. SKILLMAN ROTARY LATHPUNCH DRIVE 4 Sheets-Sheet 5 Filed Feb. 28, 1950 INVEN TOR.

Ema 5 01mm,

S /Mala? ATTOFNEPI July 24, 1951 v E. SKILLMAN 2,561,826

ROTARY LATH PUNCH DRIVE Filed Feb. 28, 1950 4 Sheets-Sheet 4 INVENTOR.Elva/Ayn Sxmv,

Patented July 24, 1951 ROTARY LATH PUNCH DRIVE Edward Skillman,Enterprise, Kans., assignor to The J. B.. Ehrsam & Sons Manufacturing00., Enterprise, Kans., a corporation of Kansas Application February 28,1950, Serial No. 146,769 r The present invention relates to a rotarylath punch, and is particularly concerned with the ham provement ofcertain details of structure, and a resultant improvement in operation,of previously known machines for accomplishing substantially the samebasic function. That basic function, of course, is the production ofmultiple perforations in plaster lath flowing continuously, at uni" formlineal velocity, from a board forming machine, by means of rotary punchand die assemblies. The conditions under which the work must beperformed are substantially those described in the patent to Emmet D.Benham and John R. Rosenleaf No. 2,228,162, issued January '7, 1941, andthe particular punch and die arrangement preferably used in the presentmachine will be substantially that disclosed in the patent to William J.Ehrsam No. 2,182,744, issued December 5, 1939.

A machine of the character here under con-- sideration is primarilyintended to perforate plaster lath, or other material moving through amachine in a continuous stream at a constant lineal velocity, by meansof punches moving through the material upon lines normal to the plane ofmovement of the material, said punches concurrently moving with thematerial in the line of its flow and at its own velocity, whileobviating the necessity of either starting and stop ping the materialhow or providing for reciprocation, in the line of material flow, of acarriage supporting the punching mechanism. Otherwise stated, such amachine must include punching mechanism, comprising cooperating elementsmoving continuously about separate closed orbits, but cooperating with astream of material, moving uniformly in a single plane between thoseorbits, the punching mechanism being so operated as to penetrate theflowing material upon lines normal to the plane of movement of suchmaterial, while synchronizing the punching mechanism with the flowingmaterial throughout the period ofengagement of the punching mechanismwith such material.

It is the primary object of the present invention to provide improvedmeans for controlling the attitudes of gangs of punches and gangs ofcooperating dies, arranged in separate series, during revolution ofthose gangs about separate axes, in such a fashion that, as each gang ofpunches approaches, passes through, and departs from a plane common tothose'axes, amating gang of dies will similarly approach, pass through,and depart from that plane, in registry with the punching gang, and withthe punches 17 Claims. (01. 74-25) and the die axes precisely alignedand normal to the plane of flow of the material moving betweenthe twogangs. It is a further object of the invention to provide such improvedmeans which will so control the attitudes of the gangs of punches anddies that each gang will be inverted as it passes through the remainingportion of its orbit.

A further object of the invention is to provide, for each such gang ofpunches and for each such gang of dies, a follower arm of improvedconstruction, all of such follower arms for the punch gangs cooperatingwith a single cam and all of such follower arms for the die gangscooperating with another single cam, the follower arm construction beingsuch as to provide for extremely delicate adjustment of the attitudeassumed by its associated gang to correspond with any spe cific locationof the follower arm relative to its cam. A further object of theinvention is to provide improved means, in association with each suchsang for resiliently holding its follower arm in cooperative associationwith its cam.

Still further objects of the invention will appear as the descriptionproceeds.

To the accomplishment of the above and related objects, my invention maybe embodied in in the form illustrated in the accompanying drawings,attention being called to the fact, how-l ever, that the drawings areillustrative only, and that change may be made in the specific:construction illustrated and described, so long as the scope of theappended claims is not violated.

Fig. 1 is a vertical sectional view through a fragment at one end of amachine constructed in accordance with the present invention;

Fig. 2 is a similar view of a fragment at the opposite end of suchmachine;

Fig. 3 is an end elevation, taken upon a reduced scale, and showing thatportion of the machine illustrated in Fig. 1, parts being broken awayfor clarity of illustration;

Fig. 4 is a similar elevation of that part of the machine illustrated inFig. 2, parts being broken away for clarity of illustration;

Fig. 5 is a sectional view taken substantially on the line 5-5 of Fig.2;

Fig. 6 is a similar view taken substantially on the line 66 of Fig. 2;

Fig. '7 is a perspective view, taken upon an enlarged scale, and showingthe details of construction of a follower arm;

-Fig. 8 is a broken perspective view, likewise drawn to an enlargedscale, and showing the a it of Whatever nature, and to various pressingprocedures, and the 1ike.-

Green plaster board is delivered, from a board forming machine, at arelativelyfhigh,constant,

lineal velocity In accordance with the present invention, it is ledbetween the two rotors of the machine illustrated herein, .and :asrit:passes (between those rotors, punch and die sets, arran ed in series organgs, cooperate with the moving stream of material to form, at spacedintervals, transverse lines of transversely spaced perforations,'b ysevering from the green plasterboard slugs of material whcse-sizea-ndshape will bede- 'termined by the punch and-die sets-used. Theconstruction is-such-that the severed slugs of-material will usually bedriven downwardly "completely -through the dies, to drop from the lowerends of said dies; but the die sets are ginverted, during eachcye'le ofoperation,-so that-suchslugs may occasionally drop awayfrom the "dies"in the opposite direction during such-inversion thereof.

Referring more particularly to the drawings, it will be seen that I haveillustrated amachine comprising a frame upon which-is journalled a powerinput shaft 2|- which may "carry :a sprocket 22 -throug-h =w-hich themachine may be chain driven from any suitable'outside source "of power.Within a suitable housing upon the frame, the shaft 2i carries anelliptical ;-gear 23 meshing-with a mating elliptical-gear 25-upon-asecond shaft 2'4 *journalled in the "machine 'frame upon an axisparallel with the axis of the shaft :21. The reason for the use ofelliptical gearsand the particular design of such gears, will appear asthe description proceeds.

The shaft 24 further carries apinion 261meshing with -a much larger spurgear 21 on a shaft 28 whose opposite ends are journajlled respectivelyin the .opposite'end members of the frame 20,

bearings, such as 29, preferablybeing providedfor supporting said shaftends in end panel-members such as 30.

Each endpanele ll is provided, in a region above the bearings 29, withavertica-lly extendingtrackupper end of each shoe 32 issuitably secureda rod 35, threaded at its upper, end, as at 36, for cooperation with anut 3-1 (Figs. 1 and 2) journa'll-ed for rotation, but held againstreciprocation, in a suitable-support on the frame panel 36. *Fixed 'to,or integral with, each nut 31, is a beveled gear 3'8, and a shaft 39spans the region between said gears 38 and carries two beveled gears 40,each meshing with one of said gears 3'3. Two handwheels 4|, one ateachend of the machine, are mounted upon the shaft 39' for rotating thesame; and it will be obvious that rotation of the shaft 39 in onedirection or the other will elevate or depress the shoes 32,correspondingly shifting the shaft 34 which is journalled in said shoes,while a l maintaining parallelism of said shaft with the shaft 28.

Two spiders, 42 and 43, are mounted at opposite ends of the shaft 28,each of said spiders being formed, at peripherally spaced points upon acommon circle concentric with the shaft 28, with a plurality of openings44 for the reception 41f .theshaftsections or .trnnnions 45 .carried at:opposite'ends'of carriages 4'B. Each carriage 45 comprises a bolster 41(Fig. 6) to the outer suruface of which is suitably secured a plate 48proportioned and designed to receive a plurality of hollow-idles 49,each die registering with a passage 50 extending through the bolster 41.Any .suitablemeans (notshown) may be provided for removablysecuring' thedies 49 in the plate 48.

At one end of each carriage 46, the trunnion 45 is pro vided with-an-extension 5| (Figs. 2 and 7) upnn which is carried a follower armindicated generally by the reference numeral 52 and adapted to cooperatewith a cam track 53 defined on a "camplateFB l. Such a cam ,plate'is"illustrated in detail in Fig. 6, and may preferably comprise mating"sections5'4a and 54b suitably secured together 'by bolts 1'55 or-otherequivalent fastening means, and providcd with cooperating, outstandingwalls 56;and*51 which,- when the sections are qperatively connected,registerto define the continuous cam trackway 53.

Each-follower arm 52 (Fig. 7) comprises a hub Tiliflxed ;to its trunnionextension 5| -loy meansof a key 591and 'setscrewfill, and having an arm*fi-l substantially radially projecting therefrom. At

its'free end, the arm -6| is bifurcated to define spaced furcationsBZand 63. A screw t4 threadedly penetrates the 'furcation 63 and carries alocknutfifi; and a similar screw -56 is similarly associated with.thetfurcation52. A lever *6! is provided atone end with a hub68 freelyjournalled on the hub 58; and is further provided at its oppoSiteendwitha further hub 69 in which a journal pinln is fixed by means of a'setscrew'll. At its end'remote-from the carriage 46, the pin Til mountsa-cam-following roller 12 adapted 'to be received in the trackway 53between the walls 56 and 51.

"The hub 69 projects axiallyto overlap the-free end of the arm BI, andis provided with a radially-inwardly-extending abutment finger T3 which,when the parts are assembled, lies between the arm furcations 62 and 63with its opposite faces positioned forengagement,,respectivelxby-thefacing ends of the screws 64 and'BE.,Itwill be obvious that, by adjustment of said screws, the position ofthe roller -'l2 relative to its carriage 416, and so the position orattitude assumedby such carriage to correspond to anypredeterminedposition of theroller 12 in the'tracliway 53, may be very nicely anddelicately adjusted. Headed bolts 15, passing through arcuate'slots '14in the arm 61' and threadedly engaged in the lever 61, hold said leveragainst axial movement away from the arm SI, and may, if it is deemeddesirable, be tightened to "assist in holding said lever in any selectedposition of rotational adjustment relative to the arm.

, As-is most clearly to be seen in Fig. 2, the cam plate '54 is suitablysupported upon an end panel 30 at that end of the machine remote fromthe gears '23 and 25; and, in its region adjacent the shaft 34, 'it isprovided with a section, indicated by the reference numerallfi in Fig.5, in which the median line 11 of the trackway 53 lies in a circularare, extending from a point It to a point 19, cast about a point 80.,The point lies in the horizontalplane including the axis 8| of the shaft28, and in a plane, parallel with the plane common to the axes of theshafts 28 and 34, and spaced therefrom by a distance equal to thedistance betweenthe axis of the trunnion extension 5| and the axis ofthe pin of any follower arm. The radius of the are 16 is equal to theradius of the orbit of the trunnions or shafts 45.

The cam plate sections Ma and Mb are joined in the plane common to theaxis 8! and the point 00 being provided with sections forming a hub 82coaxial with the shaft 28, the cam track 53 surrounding said shaft axis.The plate 54 is provided with a plurality of arcuately elongated slotspenetrated by screws 83 threadedly engaging the panel 30.

At a suitable point in its perimeter, the plate 54 carries a tongue 80radially arranged with respect to the hub and the panel 30 carries abracket 85 provided with parallel projecting fingers 86 and ill inwhich, respectively, are mounted screws 06 and 8S projecting intoengagement with thetongue 0d. Adjustment of the screws 38 and 89 will,of course, result in very delicate and accurate adjustment of the camplate 50 about the axisof the shaft 28.

The parts are so arranged that, as each carriage 45 approaches the planecommon to the axes of the shaft 23 and M, its follower arm roller I2will enter the cam trackway section 76; and that section, designed inthe manner above described, will hold the roller 12 in such a posi tion,relative to the shaft axis of that carriage that, as the carriageapproaches, passes through, and departs from the said plane common tothe axes of the shafts 28 and M, the surface of its bolster 4! will beheld in a truly horizontal position.

As the roller l2, moving in a clockwise direction as viewed in Fig. 5,passes the point 19, it begins to move downwardly more slowly than doesits associated shaft 05, so that the bolster will be tilted in aclockwise direction and will assurne the position indicated at A in Fig.6. From that position, the bolster will be moved to the positonindicated at B; and as the bolster again approaches the above-mentionedplane, in the region remote from the shaft 3 it assumes a fully invertedposition as indicated at 0. Any refuse which may have been deposited onthe plate d3 will, of course, fall away from the bolster by gravity asthe bolster passes through these positions; and since, at the positionC, the carriage is inverted, slugs of material driven through the portses of the carriage which is currently in active position, will fall uponthe radially inward portion of the carriage which is in position 0,rather than upon the active surface of its plate 43.

Thence, the carriage moves to position D and then to position E in whichit is closely approaching the horizontal attitude which it will retainas its roller 12 traverses the section I0 of the cam trackway.

Adjustment of the cam plate through the medium of the screws 88 and 09and the tongue 84 permits accurate location of the cam trackway sectionIii relative to the path of the carriages carried on the shaft 3Adjustment of the screws M and til (Fig. '7) makes possible absolutelyaccurate and uniform response, in the attitude of each carriage, to thecam trackway section it as the roller of that carriage traverses thatsection.

At its opposite end, each carriage trunnion 45 is '6 provided withspring by the reference numeral 90 (Figs. 1 and 8) applying to thecarriage a turning force resiliently holding its roller I2 incooperative engagement with the wall 50 of the cam trackway 53.

At this end, each trunnion i5 is formed with a reduced section 9idefining an outwardly facing shoulder 92. This section of the trunnionis internally threaded as at 94 to receive a reduced threaded end 95 ofa stud 90 whose opposite end is formed with a threaded socket for thereception of a clamping bolt 51. A ring 90 is removably secured to theouter face of the spider 42 by suitable means such as screws 90, andsupports a ball or roller bearing I00, whose outer race is received inthe ring 08 and. whose inner race snug- 1y embraces the reduced section0| of the trunnion 45 to support the same. The stud 95 00- operates withthe inner race of the bearing I 00 to clamp the same against theshoulder 02.

An annular disc IOI is suitably secured to the ring 08 as by screws I02,or the like, and. said disc is provided, at spaced points about itsperipheral region, with a series of axially projecting teeth I03.

An annular housing member MM is provided with an axially extendingperipheral flange I05, and is adapted to be secured to the above-de=scribed parts, for rotational adjustment relative thereto, by means ofthe bolt 07, a washer I00 preferably being interposed therebetween. Atspaced points about its free edge, the flange I05 is provided with aseries of notches Q06 for co operative interengagement with the teethI03 of the disc It".

A coiled spring I09 is housed within the chamber defined by the elementsHM and IM, one end III) of said spring being anchored upon the elementI04, for instance, by projecting through a radial slot III in the flangeI05. The other end H2 of the spring I09 is anchored upon the stud 90,and while such anchorage may take any desired form, I have shown apreferred means comprising a pin or rivet H3 received in a punched holein the spring end and carried upon a key-like element IM axiallyslidably movable, to a limited degree, within a keyway H5 formed in theperiphery of the stud 96. This arrangement, while providing a solidanchorage preventing relative rotational movement between the trunnion45 and the spring end Iitl, nevertheless permits limited relative axialmovement therebetween to prevent any jamming which might otherwise occurduring variations in the tension of the spring I09.

It will be obvious that, upon loosening the screw 91 to permit theelementv lli i to be backed away slightly from the stud es, therebydisengaging the teeth I03 from the notches its, the element I04 may berotated in a clockwise direction, as by means of a wrench taking intotwo or more of the holes I01 formed in a peripheral series, to tightenthe spring I09. So long as the teeth 33 and notches I00 areinterengaged, there can be no relative rotation between the elements I04and IOI. While tensioned, of course, the spring I09 will exert a turningforce upon the shaft or trunnion 45 tending to rotate the same in aclockwise direction, as viewed in Fig. 8 and in Fig. 5, to hold theroller 12 in engagement with the wall 50 of the cam trackway 53.

Simi1arly,the shaft 34 carries spiders IIBand I I1 (Figs. 1 and 2)adjacent its opposite ends, said I spiders being formed with peripheralseries of openings for the journal mounting of trunnions means indicatedgenerally be arranged atthe bottom of the continuous trackway, so thatall carriages II9 will be held in horizontal position as they passthrough the lower section of' their orbit. At the. opposite end of. themachine, each trunnion has associated.

therewitha spring device I Min all respects identical withthe springdevices 96 hereinabove described..- Each carriage IIIS comprises. abolster I25. upon which is suitably carried a plate I26 supporting aseries of punches. I21 for. cooperation. with the dies 3; and astripper. plate I28 may preferably be associated with said. punches.

Preferably, each. carriage 46 is provided adjacent each end with one ormore heavy pins I29- perpendioular to the surface of its bolster I; andeach carriage H9 is provided at its opposite ends; with corresponding,sleeves I33- located. on

axes perpendicular to the surface of. the bolster I25. As is indicatednear. the center of. eachof Figs. 11 and 2, the pins: I29. of. eachcarriage 46-Wil1 snugly nestin the sleeve I30- of its mating carriageI-I.9-- during the actual punching operation. Since all of the carriagesare resiliently held. in their cam-dictated attitudes, any slightmisadjustm'entof follower arm will be corrected, during the punchingphase, by the engagementof thepins I29 inthe sleeves I30.

At its endremote from the gear 21; the. shaft 28- carries a large spurgear I3I.- (Figs. 2 and 4);. and at its corresponding, end, the shaft34- Similarly carries a similar gear I32 which when the.

parts are in the positions of Figs. 3 and 4, meshes.

with the gear I3! to provide. a driving connection between the shafts 28and 34 whereby said shafts will be turned at equal velocitiesin.opposite directions. The gear I3I is suitably fixed to. the. shaft 28,while the gear I32 is loosely mounted uponthe shaft 3 3,. the drivingconnection between the gear- I32 and such: shaft 34 being provided bythe:

device now to be described. Projecting from oneface of the gear I 32 isa 111g I33 adapted to'be pos-itioned between a pair of spaced. ears I34.and I35 on a hub element I33 keyed. on the shaft 34. The ear. I34.mounts an adjusting screw I31- and: the ear I35 mounts a similaradjusting screw I38.v

Said screws I31 and I38 are turned up against.

the opposite faces of the lug I33 to providea fixed driving connectionbetween the hub element I36: and the gear I32; and itwill be clear thattheangula-r relation between the shaft 34 and the gear I32 can be verydelicately adjusted by opposite. adjustment of the screws I31 and I33.vBy means:

of such adjustment, precise and accurate regis-. try between thecarriages 43' and the carriages I-- I9 can be attained and maintained.

It is essential, under certain conditions,. that the shaft 34 be raisedto an extent sufficient to. prevent coactionbetween. the punches I21 andthe dies 49. It islikewise essentialthattherotorsbe maintained always inaccurate registry... Sinceelevation of. the shaft 3&- tea degree sufilcient to prevent such coaction will inevitably disen gage the meshingteeth of the gears I 3t and I32, some means must be provided for.maintaining that. registry during such disengagement. Likewise,."I haveprovided means for positivelylimiting downward movement of. the shaft,34, in order that the gears I31 and I3? may not become jammed; Suchlimiting means preferably comprises a screw I39 (Figs. 2 and 3-)adjustably reoeivedin a cooperating socket in the lower edge; of theshoe 32, a lock nut It on said screw for" holding the screw in anydesired position; of adjustment, and a fixed abutment HI I, rigid withthe machine, frame, and engageable by the sorew I39, upon downwardmovement of the shoe, to

limit such downward movement.

A link I42 has one end jo'urnall'ed on 9. modes.- tion of the shaft 34,the othe'r'end of said link supporting an axle I43 upon which is fixed aspur gear I44. The link length is such as to hold thegear I44 always inmesh with the gear I321 A frame I45, which. may comprise merely a pairof. straps, engages the axle I43 and another axle I43 upon which ismounted a gear I41 whose pitch diameter is identical with that of thegear link I 48 being such as to hold the gear I41 always in mesh withthegear I13 I. As shown, I provide two links I48, one engaging each end' ofthe axle I46. A trunnion element I5Il' is supported in the. frame panel33 and provides. a journal mounting for one end of a link. I49',,theother; end of said link. I 33 being engaged with the axle. I43. The axisof the trunnion element I50 lies. in the plane. defined. by theaxes ofthe shafts 28' and 34', and the trunnion element I53 is spaced above thefixed axis. of. the shaft 28 a distance equal to the distance. betweenthe axes of. thev axles. I43 and I46, so that the links I48 and I49 arealways parallel.

The cam plate I23 is mounted, like the cam plate- 54, forrotationaladjustment about the axis of the shaft 34. In Figs. 1 and 9,1have shown a member I5I formed to. provide spaced. parallel arms I52and. I53 between which projects a tongue I54 similar to the tongue8d,.screws I55: and [56; 1

threadedly carried by said arms I52 and I53, en-

gaging opposite facesof said tongue I54 to provide directly engagedwiththe work material throughout a period during which the carriages 46and H3 move. through an angular distance of some twenty-five or thirtydegrees, corresponding to the. cam. track section It. Since thecarriages are moving inan arcuate path. while. the work material is.moving, rectilinearly, it. will be obvious that the absolute velocityeither of the work or of. the carriage must be varied" during; thatperiod of engagement, in order to main.- tain. s-ynchronism between thepunches andthe work. Since board-making. machinery ordinarily deliversthe green plaster board at a constant. lineal. velocity, I have providedfor varying the angular velocity of the two rotors during the periods ofengagement of the punches with the material in order to.- maintaindesired synchronism. As has been stated, the entire machine hereindescribed is. driven, from the shaft El, through the. elliptical gears23 and 25. Those gears are so proportioned and designed that, While the.shaft 2| rotates at. a constant. angular Velocity, the velocity of theshafts 28" and 34 will be continuously varied. As a punch I21 approachescontact'with the flowing stream of 5 work material, and from that. pointthe pointof deepest penetration is reached, the angular velocity of theshafts 28 and 34 will be I gradually decreased; and, from the point ofdeepest engagement to the point at whichthe punches, leave the workmaterial, the angular velocity of such shaft will be graduallyincreased, the rate of Variation in the angular velocity being such asto maintain constant lineal velocity of the carriages in the directionof flow of the worlr material throughout the period of engagement of thepunches with. the work material. The gear 26 (Fig. 3) hasa pitchdiameter, in the illustrated embodiment of the invention, equaltoone-sixth of the pitch diameter of the gear 27, and each rotor isprovided with six peripherally-spaced carriages. Thus the shafts 2| and2d and the elliptical gears '23 and 25 make one complete revolutionwhile moving each carriage 45 through its active cycle.

I claim as my invention:

1. In a device of the class described, a pair of rotors, means mountingsaid rotors for rotation associated cam means, said follower arms, beingof equal effective lengths, each cam means including a circular arcuatesection acting upon eachfollower arm successively to hold the associatedcarriage with its work support normal to a plane joining said rotor axesas such carriage' traverses such plane between said rotor axes duringrotation of said rotors, and each cam means including other sectionsacting upon each follower arm successively to invert the associatedcarriage as such carriage travels through the section of its path remotefrom the other rotor, and means correlating said rotors to cause acarriage of one series to traverse said lplane always simultaneouslywith, and in cooperative registry with, a carriage of the other series.

2. The device of claim 1 in which each cam means comprises an endlesstraokway defined by a pair of parallel, mutually facing walls, and aroller carried adjacent the end of each follower arm remote from itscarriage and confined between said walls.

3. The device of claim 2 including resilient means operatively connectedto each carriage and applying thereto a turning force about the axis ofsuch carriage resiliently urging its associated roller toward one ofsaid walls.

1. The device of claim 1 in which each follower arrn comprises anelement fixed to its carriage and projecting substantially radially awayfrom the axis of said carriage, a second element mounted for oscillationabout said axis andprojecting substantially radially away from saidaxis, cooperating means on said first and second elements for shiftingsaid second element angularly about said axis relative to said firstelement, and means engageable with said cam means carried by said secondelement at a point remote from said axis.

5. The device of claim 4 including spring 'stantially radiallytherefrom,

lever in any selected inwardly projecting abutment on means operatively.connected with each carriage and with its rotor, said spring meansapplying a turning force to its carriage about the axis thereofresiliently urging said last-named means into coactive engagement withits cam means.

6. The device of claim 1 including spring means operatively connectedwith each carriage and with its rotor, said spring means applying aturning force to its carriage about the axis thereof resiliently urgingits follower arm into coactive engagement with its cam means.

7. In combination, a. shaft, means supporting said shaft for revolutionabout an external axis and for turning about its own axis, cam meansmounted to surround said external axis, an arm fixed to said shaft andprojecting suba lever mounted for oscillation about the axis ofsaid'shaft and projecting therefrom substantially in the direction ofprojection of said arm, means carried by said lever at a point remotefrom said shaft axis and operatively engaging said cam means, andcooperative means on said arm and on said lever for shifting said leverangularly about said shaft axis relative to said arm and for holdingsaid position of adjustment relative to said arm.

8. The combination of claim '7 in which said last-named means comprisesan abutment on said lever and two oppositely-facing elements carried bysaid arm in facing relation to opposite surfaces on said abutment, saidelements being independently adjustable, relative to said arm, alonglines substantially tangent to acircle drawn about said shaft axis.

9. The combination of claim 7 in which said lever is longer than saidarm, the free end of said arm being bifurcated, and in which saidlastnamed means comprises a substantially radiallycated between thefurcations of said arm, a screw adjustably mounted in one of said armfurcations and bearing against one face of said abutment, and a secondscrew adjustably mounted in the other of said arm furcations and bearingagainst the opposite face of said abutment.

10. In combination, a shaft, means supporting said shaft for revolutionabout an externalaxis and for turning about its own axis, cam meansmounted to surround said external axis, a follower arm fixed to saidshaft and projecting substantially radially therefrom and provided withmeans engageable with said cam means to control turning movement of saidshaft about its own axis during revolution thereof, and means mounted tomove with said shaft about said external axis and continuouslyresiliently urging said shaft toward turning movement in one directionabout its own axis to hold said last-named means in cooperativeengagement with said cam means.

11. In combination, a shaft, means supporting said shaft for revolutionabout an external axis and for turning about its own axis, cam meansmounted to surround said external axis, a follower arm fixed to saidshaft and projecting substantially radially therefrom and provided withmeans engageable with said cam means to control turning movement of saidshaft about its own axis durin revolution thereof, an element fixed tosaid supporting means and projecting radially from the axis of saidshaft, a member journalled for rotation about the axis of said shaft, acoiled spring having one end anchored relative to said shaft and one endanchored relative to said memsaid lever losa s bw e nfi ny' mam-11y;therefrom a s 'provided'with li nge ihe. p ab e el 1161s 5% 1i andmeans. q ip d? i Said me esiselee- 7, viii any 118 b 22 ui l ir o RQiiiPQ I Qj qi iq'nal gn; m. lative be se 'q sninew. forfevol'ution'abont an external axis r turning about its own axis, Qammeans to s irionml sgii xternail' agfxis', a 91- fln, fizge'l fto sagashaft and projecting. s bm'e 'ns engageabl'eswith' said cam means tocont of 'sg qysnafu about its t-rpi, Lupmn v fidii f. irm ng. bqet ts wnmaimed to surround "said externelfnxis', a; n lew r x d o. eis ha t andlf i j fii 1 1y l idiagil yiherefrom' endpr'ovidegi with d l w h sai m11 3 0 b movernent of said snejft-about'its is lut on er -9 n nul r osaid siippdrting' means and eons i grii; with tri ax s, orsaid shaft, ase condfah a, bait, mea s supporting n s me: n xt r lel @3 n i s, ii yen i n mpemfieflzn q mroimivse s e t rn T si' 9%? a m fixe e q aid hlfit nd prdiecfiingsube sfiantieny radially ftheiefroin and provided'wi'fih & ense eeb yi t-h id' i n e er i l Wrms 'we em of e qf ie wtite nxna i'd k'; a i a t; niean su portine cam nakns hiss-138% 1 2axisjduring revqlntiontni eoi, an element to said supporting meansany;projecfeing ra giial ly f'roin't'he Lxis of'said shaft, 2. nieniiberj ournlleld or f 'iq i bqe' h' axe e is a'weng sp ing having one endanohored relaiive to seid er means rotationally fixed reletive tosaid meE: fi' w; m n ein' p limited xi l mqv menfi iejl jive thei etojthe otherenqof said springbeing anehorecirelative to saidiastfnernedn eans and md r holding sa mem eleqtive y in n 2 of a rali os iions. 3. p a ee dustm n relat ve, t eig lelement n c m nation! a tor n din sepsis oi axial pac axialsp j .r's asfh ha in ne end 'journalled in' one of saidspiders and hayin a regiuced sectiona tr its. other end, an'annularelement fixed to the other of said spiglers, a. bearingfinohiding an'outer rape; supported from said element andan inner, race sleevedvonsaid reduced section and supporting the, other end of said shaft, a,stud axially, re novap'ly. seemed to said other end of said shaftandhaving an ex ernel dieme r xc di a of ai r uces section said studmeeting, with said bearing inner race to coniine the same against? axialmovement relative to saidsha ft an annular member jqure neueq. fer"rotation about they axis 01: 5am shaft, a iled: ri n n d: be een... a d;nnul r nen ber and said annula y element and having n enden he r a i e sid ann e emr her and one end anehogedrelative to said shaft, andmeensfor holding said annular membelj seleotively in any .one'ofaphiirelityof positions of rotational a d jus tmenq relative to saidennularelement. 16, The combination of claim 15in which said stud is pljovideplwith I an axially ezg'tendingkey slot, a key moented in s aidi'slot ffbrlimited exial mov men therein; n a m ns an ho ng aid last-named end 0isaid'spring to said. key.

1'7. If he combination of claim 16 inwhichsaipl ain l la r.zfne'rlribe rand seidennule r elen ent c0- opei ate todefine' a closed ohaznberinwhich said 59 1 1 5 s, ocate (11161 n hiqh said o din mews. om s n er'neaeine; m a n ai em nt zx lmem en- DWARD REFERENCES. ITED.

The following references are of record in tlge file O h s a e t UNITED-STATES PATENTS me. Date. L ne, 17 7' "5772-7.- b.-

